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Synaptic Mutant Affecting Only Megasporogenesis
Pollen Stainability distribution and Yield
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_p_s 2n egg formation 2n gametes 2n pollen 2x x 4x 4x crosses allele anaphase apospory assortment assortment assortment hypothesis asynapsis centromere chromatid chromosome clones cultivars cultivated tetraploid cytokinesis cytological cytological observation diplandroids diplogynoid formation diplogynoid production diplogynous tetraploid families diploid diploid potatoes division restitution duplex dyad FDR 2n eggs FDR diplandroids FDR diplogynoids gametophyte gene frequency genotype Group Tuberosum half-tetrad analysis Hancock 19 heterozygosity linear tetrad male sterility megaspore mother cells megasporogenesis meiocytes meiosis Merrimack metaphase microsporogenesis mode of 2n mode of diplogynoid Mok and Peloquin normal nucellar cell nuclei nulliplex progeny number of plants parallel spindles Phureja plogynoids pollen stainability pollen stainability distributions produced diplogynoids Proposed genotype Pspspsps or PsPspsps Pspspsps Pspspsps Pspspsps Pspspsps Table 4-2 restitution nucleus rH CM Rhinelander 26 S. J. Peloquin Sebago second division second meiotic division sexual polyploidization somatic doubling spores synaptic mutant telophase triad analysis triploid tuber yield univalents yyyy